Tool/software:
We are designing our Flyback circuit with 400Vin and 18Vout, 13W using this controller.
I have used datasheet to calculate Rcs,
for an efficiency of 85% and ηxfmr of 91%, Nps = 6; Rcs can be calculated from datasheet formula as (VCCR*Nps*sqrt(ηxfmr))/(2*Iocc) = 1.104ohms
But the SLUC579 excel sheet says the Rcs is 0.617Ohms.
May I know the reason for this.
I am getting bigger primary inductance from data sheet calculations than Excel sheet. Can we get the formulae used for Excel sheet, may be an unlocked one.
Thanks.
